Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
The constituent common to duralumin and alnico is
Co
Mn
Al
Mg
Correct answer is C
Constituents of duralumin are: Al, Cu, Mg, Mn.
Constituents of Alnico are: Al, Ni and Co
In 1909, the alloy of duralumin was discovered by Alfred Wilon consisting of 94% Al, 4% Cu, 1% Mg and 1% Mn(Manganese)
Alnico is an acronym referring to a family of iron alloys which in addition to iron are composed primarily of Al, Ni and Co.
The general formula of alkanones is
RCHO
RCOR'
RCOOH
RCOOR
Correct answer is B
Alkanones also known as ketones have the general formula RCOR'
Right leading to the production of more SO3(g)
Right leading to the production of more SO2(g)
Left leading to the production of more SO2(g)
Left leading to the production of more SO3(g)
Correct answer is A
No explanation has been provided for this answer.
2AI(s) + 6H2SO4(1) → AI2(SO4)3(aq) + 6H2O(1) + 3SO2(g)
2AI(s) + 3H2SO4(1) → AI2(SO4)3(aq) + 6H2O(1) + 3SO2(g)
2AI(s) + 4H2SO4(1) → AI2(SO4)3(aq) + 8H2O(1) + 3SO2(g)
2AI(s) + 5H2SO4(1) → AI2(SO4)3(aq) + 8H2O(1) + 3SO2(g)
Correct answer is A
No explanation has been provided for this answer.
Which of the following gases is monoatomic?
Argon
Chlorine
Nitrogen
Oxygen
Correct answer is A
No explanation has been provided for this answer.